| CloudScan | PDF-XChange Viewer | NAPS2 (Not Another PDF Scanner 2) | Portable NAPS2 (Not Another PDF Scanner 2) | |
| 3.0 | 9.5.368.0 | 8.1.4 | 8.1.4 | |
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| Freeware | Freeware | Open Source | Open Source | Licence |
| FREE | FREE | FREE | FREE | Price |
| 3.82 MB | 14.10 MB | 42.90 MB | 61.60 MB | File size |
| Oct 30, 2011 | Apr 7, 2023 | Apr 9, 2025 | Apr 9, 2025 | Update |
| 58 | 214 | 28 | 30 | Downloads |
| Android, iPhone, iPod, Windows 7 x32, Windows 7 x64, WinServer, Windows Vista, Windows Vista x64, Windows XP | Windows XP, Windows Vista, Windows Vista x64, Windows 7, Windows 7 x64, Windows 8, Windows 8 x64, Windows 10, Windows 10 x64, Windows 11 | Windows 11, Windows 10 64 bit, Windows 8 32/64 bit, Windows 7 32/64 bit, Windows Vista, Windows XP 32/64 bit | Windows 11, Windows 10 64 bit, Windows 8 32/64 bit, Windows 7 32/64 bit, Windows Vista, Windows XP 32/64 bit | OS |
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